@article{fdi:010082152, title = {{E}valuation of high-resolution atmospheric and oceanic simulations of the {C}alifornia {C}urrent {S}ystem}, author = {{R}enault, {L}ionel and {M}c {W}illiams, {J}. {C}. and {K}essouri, {F}. and {J}ousse, {A}. and {F}renzel, {H}. and {C}hen, {R}. and {D}eutsch, {C}.}, editor = {}, language = {{ENG}}, abstract = {{T}his paper is the first of two that present a 16-year hindcast solution from a coupled physical and biogeochemical model of the {C}alifornia {C}urrent {S}ystem ({CCS}) along the {U}. {S}. {W}est {C}oast and validate the physical solution with respect to mean, seasonal, interannual, and subseasonal fields and, to a lesser degree, eddy variability. {I}ts companion paper is {D}eutsch et al. (2021). {T}he intent is to construct and demonstrate a modeling tool that will be used for mechanistic explanations, attributive causal assessments, and forecasts of future evolution for circulation and biogeochemistry, with particular attention to the increasing oceanic stratification, deoxygenation, and acidification. {A} well-resolved mesoscale (dx = 4 km) simulation of the {CCS} circulation is made with the {R}egional {O}ceanic {M}odeling {S}ystem over a hindcast period of 16 years from 1995 to 2010. {T}he oceanic solution is forced by a high-resolution (dx = 6 km) regional configuration of the {W}eather and {R}esearch {F}orecast ({WRF}) atmospheric model. {B}oth of these high-resolution regional oceanic and atmospheric simulations are forced by lateral open boundary conditions taken from larger-domain, coarser-resolution parent simulations that themselves have boundary conditions from the {M}ercator and {C}limate {F}orecast {S}ystem reanalyses, respectively. {W}e show good agreement between the simulated atmospheric forcing of the oceanic and satellite measurements for the spatial patterns and temporal variability for the surface fluxes of momentum, heat, and freshwater. {T}he simulated oceanic physical fields are then evaluated with satellite and in situ measurements. {T}he simulation reproduces the main structure of the climatological upwelling front and cross-shore isopycnal slopes, the mean current patterns (including the {C}alifornia {U}ndercurrent), and the seasonal, interannual, and subseasonal variability. {I}t also shows agreement between the mesoscale eddy activity and the windwork energy exchange between the ocean and atmosphere modulated by influences of surface current on surface stress. {F}inally, the impact of using a high frequency wind forcing is assessed for the importance of synoptic wind variability to realistically represent oceanic mesoscale activity and ageostrophic inertial currents.}, keywords = {{C}alifornia current ; {U}pwelling system ; {M}esoscale activity ; {O}ceanic ; {A}tmospheric modeling ; {PACIFIQUE} {NORD} {EST} ; {CALIFORNIE} {COURANT}}, booktitle = {}, journal = {{P}rogress in {O}ceanography}, volume = {195}, numero = {}, pages = {102564 [26 p.]}, ISSN = {0079-6611}, year = {2021}, DOI = {10.1016/j.pocean.2021.102564}, URL = {https://www.documentation.ird.fr/hor/fdi:010082152}, }